public function actionUpdate()
 {
     $type_id = $_GET['type_id'];
     $product_id = $_GET['product_id'];
     $product = new Backend_product();
     $data['product'] = $product->_get_detail_product($product_id);
     $data['type_id'] = $type_id;
     $data['type_name'] = $product->get_type_name($type_id);
     $this->render("//backend/product/update", $data);
 }